Dielectric body, capacitor, electric circuit, circuit board, and device

Patent metadata

Field	Value
Publication number	US-12531189-B2
Application number	US-202318486008-A
Country	US
Kind code	B2
Filing date	Oct 12, 2023
Priority date	Apr 21, 2021
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A dielectric of the present disclosure includes a tantalum compound containing fluorine and oxygen and being amorphous, and is advantageous in terms of achieving a high dielectric constant.

First claim

What is claimed is:

1 . A dielectric comprising a tantalum compound containing fluorine and oxygen, the tantalum compound being amorphous, wherein:
the tantalum compound has a composition represented by TaO x F y , and the composition satisfies requirements 0<x<2.5 and 0<y≤0.4.

2 . The dielectric according to claim 1 , wherein two peaks are present in an interatomic distance range from 1 to 2 angstroms in a radial distribution function for a vicinity of a tantalum atom of the tantalum compound.

3 . The dielectric according to claim 2 , wherein a peak corresponding to a first neighboring atom and a peak corresponding to a second neighboring atom are present in the interatomic distance range from 1 to 2 angstroms in the radial distribution function.

4 . The dielectric according to claim 2 , wherein a first peak at which an existence probability is highest and a second peak at which the existence probability is lower than the existence probability at the first peak are present in the interatomic distance range from 1 to 2 angstroms in the radial distribution function.

5 . The dielectric according to claim 2 , wherein in the interatomic distance range from 1 to 2 angstroms in the radial distribution function, a difference between a first peak value representing a highest existence probability and a second peak value representing a second highest existence probability is 3.5 or less.

6 . The dielectric according to claim 1 , wherein the composition satisfies a requirement y>0.141.

7 . The dielectric according to claim 1 , wherein the dielectric has a dielectric constant of 26 or more at 100 Hz.

8 . A capacitor comprising:
a first electrode; a second electrode; and a dielectric disposed between the first electrode and the second electrode, wherein the dielectric comprises a tantalum compound containing fluorine and oxygen, the tantalum compound being amorphous.

9 . The capacitor according to claim 8 , further comprising an electrolyte disposed between the first electrode and the second electrode.

10 . The capacitor according to claim 9 , wherein the electrolyte includes at least one selected from the group consisting of an electrolyte solution and an electrically conductive polymer.

11 . The capacitor according to claim 9 , wherein the electrolyte includes a solid electrolyte.

12 . An electrical circuit comprising the capacitor according to claim 8 , wherein the capacitor is mounted to the electrical circuit.

13 . A circuit board comprising the capacitor according to claim 8 , wherein the capacitor is mounted to an electrical circuit formed on the circuit board.

14 . An apparatus comprising the capacitor according to claim 8 , wherein:
the capacitor is mounted to an electrical circuit formed on a circuit board, and the apparatus is equipped with the circuit board.

15 . A dielectric comprising a tantalum compound containing fluorine and oxygen, the tantalum compound being amorphous, wherein:
two peaks are present in an interatomic distance range from 1 to 2 angstroms in a radial distribution function for a vicinity of a tantalum atom of the tantalum compound.

16 . The dielectric according to claim 15 , wherein a peak corresponding to a first neighboring atom and a peak corresponding to a second neighboring atom are present in the interatomic distance range from 1 to 2 angstroms in the radial distribution function.

17 . The dielectric according to claim 15 , wherein a first peak at which an existence probability is highest and a second peak at which the existence probability is lower than the existence probability at the first peak are present in the interatomic distance range from 1 to 2 angstroms in the radial distribution function.

18 . The dielectric according to claim 15 , wherein in the interatomic distance range from 1 to 2 angstroms in the radial distribution function, a difference between a first peak value representing a highest existence probability and a second peak value representing a second highest existence probability is 3.5 or less.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• MASHIKO Hisanori
• Adachi Hideaki
• Suzuka Michio
• Goto Takehito
• Kikuchi Ryosuke
• Kanou Manabu

Classifications

• H01G2009/05

  consisting of tantalum, niobium, or sintered material; Combinations of such electrodes with solid semiconductive electrolytes, e.g. manganese dioxide · CPC title

• H01G9/15

  Solid electrolytic capacitors (H01G11/00 takes precedence) · CPC title

• H01G9/048

  characterised by their structure (H01G11/22 takes precedence) · CPC title

• H01G9/042

  characterised by the material (H01G11/22 takes precedence) · CPC title

• H01G9/145

  Liquid electrolytic capacitors (H01G11/00 takes precedence) · CPC title